Friends of PDF

all our visitors are our friends. we love them all. we want them to find and download pdf files from our website. we do our best to satisfy them. and they share our website on their facebook walls.


20 Nov USSD request as the USSD Gateway which the company provided for this thesis. The main .. cording to the SDL flow for USSD. Indirect. 10 Jul Non-confidential. Official Document IR – USSD Interworking Guidelines. V Unstructured Supplementary Service Request. VLR. Unstructured Supplementary Service Data (USSD), sometimes referred to as ” Quick Codes” or USSD can be used to provide independent calling services such as a callback service (to . GSM (ETSI EN , V) Specification (USSD) Stage 3 – 3GPP; USSD Technology and packet flow in GSM network.

Author: Akirisar Arashilabar
Country: Austria
Language: English (Spanish)
Genre: Science
Published (Last): 11 February 2018
Pages: 490
PDF File Size: 6.15 Mb
ePub File Size: 9.63 Mb
ISBN: 252-8-57569-319-9
Downloads: 69642
Price: Free* [*Free Regsitration Required]
Uploader: Shaktijar

Prepaid Roaming Using USSD Callback (Roaming Implementation for Prepaid) Part 1

Some operators use USSD to provide access to real-time updates from social-networking websites like Facebook and Twitter. USSD deploys a callback mechanism, as described in the following section. Ussd call flow Ussd Gateway telecom then sends the request to your ussd application i. The time now is From Wikipedia, the free encyclopedia. However, implementing prepaid roaming with USSD is rather simple, fast, cheaper, and supported by almost all existing networks, providing a global ussd call flow.

Unstructured Supplementary Service Data

For the organization, see United States Society on Dams. External bias supply for SMPS 4. USSD call back description and call flow Thanks for your share. This site ussd call flow cookies. The USSD string contains a service code, i.

Retrieved 10 May Groups of digits may be separated by additional asterisks. Xall is also used as a separator between two parameters. After the required precall checksthe prepaid roaming platform ussd call flow two outgoing calls i.

USSD Call Back | Rauf’s Knowledge Portal

The MS can also terminate a dialogue by sending a release complete message. Originating subscriber international number. The possible error types are as follows:.

It verifies if the subscriber has enough credit balance ussd call flow pay for the requested service. As no credit checks are requiredsigning a prepaid service is a simple and hassle-free process for new subscribers.

The length and content of a USSD string is very flexible.

Extending roaming capabilities for prepaid subscribers to match jssd postpaid counterparts makes business sense for mobile operators. On disconnection from any Of the parties, it releases the call and frees up resources. From the diagram above, a request is sent from a mobile phone to a telecom network such Vodafone.

USSD Call Back USSD deploys ussd call flow callback mechanism as you know, for each outgoing call initiated by a roamer, there will be ussd call flow call legs—an international call leg back home and a follow-on call.

USSD uses the callback principle to enable prepaid roaming. The contents of a string sent ussdd the MS are interpreted as given in Table Your ussd application ccall responds to the request, and Ussd gateway goes ussd call flow and displays your content to the user Below is a another diagram to help understand the concept.

USSD Call Flow – GSM & BEYOND ……

Retrieved 11 May USSD provides session-based messaging between mobile terminals and mobile services and can also be used to enable many other value-added services such as WAP, interactive chat, prepaid balance checks, and voucher top-up. The formatting rules to create a USSD string are summarized as follows. Once the call is established between roamer and intended called party, the HPLMN monitors the service usage against the available balance in real time. If the application requests more information, it initiates a USSD requestusing ussd call flow ongoing transaction.

Could you explain how to bridge two legs between roamer and party C? The MS can also terminate a dialogue by sending a release complete message. This indicates that the receiving entity does not support the alphabet indicated in the USSD operation. Speak your Mind Cancel ussd call flow Enter your comment here If the application decides to terminate the ussd call flow, the network side sends a release complete message.

USSD can be used for WAP browsing, prepaid callback csll, mobile-money services, location-based content services, menu-based information services, and as ussd call flow of configuring the phone on the network.

USSD can be used for WAP browsing, prepaid callback service, mobile money services, location-based content services, menu-based information services, or even as part of configuring the phone on the network.

After the required precall ussd call flow, the prepaid ca,l platform initiates two outgoing calls i. Email required Address never made public. Retrieved 9 May The connection remains open, allowing a two-way exchange of a sequence of data.

Retrieved August 23, It is also used as a separator between two parameters. USSD data coding scheme.

The user access services transparently, as normal in his home network. Incompatible with call tlow. However, the churn rate is very ussd call flow, and gaining the loyalty of prepaid subscribers poses a great challenge for mobile operators. The possible error types are as follows: This parameter contains a string of unstructured information The string is sent either by calk ussd call flow user or the network. The message is terminated with a number sign.